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Math Help - physics-how to calculate speed

  1. #1
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    physics-how to calculate speed

    Practice problem: If a ball of 5 kg falls from 3 m building, what is the speed when it hits the ground?


    Please help. I'm not sure where to begin
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  2. #2
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    I can give you the idea of what to do, doing problems of the same idea in math, but I don't know formulas for you.
    One popped up that might help: d=m/v or v= d/m.

    From what I learned in math, you want to find the rate that the 5 kg falls per second (units of length/ second).

    Say for instance that it's .1t m/sec t= seconds.
    since you don't know seconds, set it off to 3 (because that formula helps show total distance if 't' is given a value).

    As in, .1t = 3 and solve for t.

    There's probably a more physicish way to do it.

    Hope that helps!
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